US2152189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steel construction
Assignee: WILLIAM P WITHEROW
•
Filing: 1936-04-23
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Granted: 1939-03-28
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Expires: 1956-04-23
Abstract
No abstract record available.
Inventors
- 👤 Henderson Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:24
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/04; E04C3/08; E04B; E04B1/00; E04B1/18; E04B1/24; E04B2/00; E04B2/56; E04B1/2403; E04B2001/2415; E04B2001/2418; E04B2001/2448; E04B2001/2457; E04B2001/2466; E04B2001/2469; E04B2001/2472; E04B2001/2481; E04B2001/2484; E04B2001/249; E04C2003/0486; E04C2003/0491
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-03-27 | 1942-09-26 | 1943-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-03-27 | 1946-09-26 | 1947-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-03-27 | 1950-09-26 | 1951-03-28 | $7700.00 | Window Closed / Lapsed |